Set/Clear DragTooltipContent

[Justin Lee]

I have a TreeView where the user drags a node and drops it on a Label.  When they drag over the label, I set the DragTooltipContent to some text about the label, and set IsDropPossible to true in the OnDropQuery Handler.  This works fine, but if they move the cursor off the label, the text is still displayed, and the arrow image (drop is allowed) is still displayed.  How do I reset the DragTooltip when they leave the label without dropping?

void lblContextName_OnDropQuery(object sender, DragDropQueryEventArgs e)
{
   Label lbl = (Label)sender;
   ((TreeViewDragCue)e.Options.DragCue).DragTooltipContent =
         "Add to '" + lbl.Content + "'";

   ((TreeViewDragCue)e.Options.DragCue).IsDropPossible = true;

   e.QueryResult = true;
}

[Tina Stancheva]

Hi Justin Lee,

It is best to move your logic into the OnDropInfo() event handler and set the e.Options.DragCue properties accordingly to the status of the Drag/Drop operation - DropPossible and DropImpossible. I updated the project I attached to the other thread you started to illustrate this approach.

Also, you can have a look at the sequence of the RadDragAndDropManager events here. I hope this helps. Please let us know if we can further assist you.

Kind regards,
Tina Stancheva
the Telerik team